1 //===-- SystemZAsmPrinter.cpp - SystemZ LLVM assembly writer ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to the SystemZ assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "SystemZInstrInfo.h"
18 #include "SystemZTargetMachine.h"
19 #include "llvm/Constants.h"
20 #include "llvm/DerivedTypes.h"
21 #include "llvm/Module.h"
22 #include "llvm/Assembly/Writer.h"
23 #include "llvm/CodeGen/AsmPrinter.h"
24 #include "llvm/CodeGen/DwarfWriter.h"
25 #include "llvm/CodeGen/MachineModuleInfo.h"
26 #include "llvm/CodeGen/MachineFunctionPass.h"
27 #include "llvm/CodeGen/MachineConstantPool.h"
28 #include "llvm/CodeGen/MachineInstr.h"
29 #include "llvm/MC/MCStreamer.h"
30 #include "llvm/MC/MCAsmInfo.h"
31 #include "llvm/MC/MCSymbol.h"
32 #include "llvm/Target/TargetData.h"
33 #include "llvm/Target/TargetLoweringObjectFile.h"
34 #include "llvm/Target/TargetRegistry.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/FormattedStream.h"
40 class SystemZAsmPrinter : public AsmPrinter {
42 SystemZAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
43 MCContext &Ctx, MCStreamer &Streamer,
45 : AsmPrinter(O, TM, Ctx, Streamer, MAI) {}
47 virtual const char *getPassName() const {
48 return "SystemZ Assembly Printer";
51 void printOperand(const MachineInstr *MI, int OpNum,
52 const char* Modifier = 0);
53 void printPCRelImmOperand(const MachineInstr *MI, int OpNum);
54 void printRIAddrOperand(const MachineInstr *MI, int OpNum,
55 const char* Modifier = 0);
56 void printRRIAddrOperand(const MachineInstr *MI, int OpNum,
57 const char* Modifier = 0);
58 void printS16ImmOperand(const MachineInstr *MI, int OpNum) {
59 O << (int16_t)MI->getOperand(OpNum).getImm();
61 void printS32ImmOperand(const MachineInstr *MI, int OpNum) {
62 O << (int32_t)MI->getOperand(OpNum).getImm();
65 void printInstruction(const MachineInstr *MI); // autogenerated.
66 static const char *getRegisterName(unsigned RegNo);
68 void EmitInstruction(const MachineInstr *MI);
70 void getAnalysisUsage(AnalysisUsage &AU) const {
71 AsmPrinter::getAnalysisUsage(AU);
75 } // end of anonymous namespace
77 #include "SystemZGenAsmWriter.inc"
79 void SystemZAsmPrinter::EmitInstruction(const MachineInstr *MI) {
80 // Call the autogenerated instruction printer routines.
84 void SystemZAsmPrinter::printPCRelImmOperand(const MachineInstr *MI, int OpNum){
85 const MachineOperand &MO = MI->getOperand(OpNum);
86 switch (MO.getType()) {
87 case MachineOperand::MO_Immediate:
90 case MachineOperand::MO_MachineBasicBlock:
91 O << *MO.getMBB()->getSymbol(OutContext);
93 case MachineOperand::MO_GlobalAddress: {
94 const GlobalValue *GV = MO.getGlobal();
95 O << *GetGlobalValueSymbol(GV);
97 // Assemble calls via PLT for externally visible symbols if PIC.
98 if (TM.getRelocationModel() == Reloc::PIC_ &&
99 !GV->hasHiddenVisibility() && !GV->hasProtectedVisibility() &&
100 !GV->hasLocalLinkage())
103 printOffset(MO.getOffset());
106 case MachineOperand::MO_ExternalSymbol: {
107 std::string Name(MAI->getGlobalPrefix());
108 Name += MO.getSymbolName();
111 if (TM.getRelocationModel() == Reloc::PIC_)
117 assert(0 && "Not implemented yet!");
122 void SystemZAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
123 const char* Modifier) {
124 const MachineOperand &MO = MI->getOperand(OpNum);
125 switch (MO.getType()) {
126 case MachineOperand::MO_Register: {
127 assert (TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
128 "Virtual registers should be already mapped!");
129 unsigned Reg = MO.getReg();
130 if (Modifier && strncmp(Modifier, "subreg", 6) == 0) {
131 if (strncmp(Modifier + 7, "even", 4) == 0)
132 Reg = TRI->getSubReg(Reg, SystemZ::SUBREG_EVEN);
133 else if (strncmp(Modifier + 7, "odd", 3) == 0)
134 Reg = TRI->getSubReg(Reg, SystemZ::SUBREG_ODD);
136 assert(0 && "Invalid subreg modifier");
139 O << '%' << getRegisterName(Reg);
142 case MachineOperand::MO_Immediate:
145 case MachineOperand::MO_MachineBasicBlock:
146 O << *MO.getMBB()->getSymbol(OutContext);
148 case MachineOperand::MO_JumpTableIndex:
149 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_'
153 case MachineOperand::MO_ConstantPoolIndex:
154 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
157 printOffset(MO.getOffset());
159 case MachineOperand::MO_GlobalAddress:
160 O << *GetGlobalValueSymbol(MO.getGlobal());
162 case MachineOperand::MO_ExternalSymbol: {
163 O << *GetExternalSymbolSymbol(MO.getSymbolName());
167 assert(0 && "Not implemented yet!");
170 switch (MO.getTargetFlags()) {
172 llvm_unreachable("Unknown target flag on GV operand");
173 case SystemZII::MO_NO_FLAG:
175 case SystemZII::MO_GOTENT: O << "@GOTENT"; break;
176 case SystemZII::MO_PLT: O << "@PLT"; break;
179 printOffset(MO.getOffset());
182 void SystemZAsmPrinter::printRIAddrOperand(const MachineInstr *MI, int OpNum,
183 const char* Modifier) {
184 const MachineOperand &Base = MI->getOperand(OpNum);
186 // Print displacement operand.
187 printOperand(MI, OpNum+1);
189 // Print base operand (if any)
192 printOperand(MI, OpNum);
197 void SystemZAsmPrinter::printRRIAddrOperand(const MachineInstr *MI, int OpNum,
198 const char* Modifier) {
199 const MachineOperand &Base = MI->getOperand(OpNum);
200 const MachineOperand &Index = MI->getOperand(OpNum+2);
202 // Print displacement operand.
203 printOperand(MI, OpNum+1);
205 // Print base operand (if any)
208 printOperand(MI, OpNum);
209 if (Index.getReg()) {
211 printOperand(MI, OpNum+2);
215 assert(!Index.getReg() && "Should allocate base register first!");
218 // Force static initialization.
219 extern "C" void LLVMInitializeSystemZAsmPrinter() {
220 RegisterAsmPrinter<SystemZAsmPrinter> X(TheSystemZTarget);